python def Method should have "self" as first argument

Question

I’m studying python through the paid online course and i got an error by typing following codes while studying module and pakages.

class Fibonacci:
    def __init__(self, title="fibonacci"):
        self.title = title

    def fib(n):
        a, b = 0, 1
        while a < n:
            print(a, end=' ')
            a, b = b, a + b
        print()

    def fib2(n):
        result = []
        a, b = 0, 1
        while a < n:
            result.append(a)
            a, b = b, a + b
        return result

and the def shows an error like "def Method should have "self" as first argument". do you know why am i having an error? i think my code should be okay, and when i try to run it though my friends laptop(window) it works well btw, I’m using mac os. sorry I’m just new to python .. :) click to see the error here

----- edited ----------------- thanks for the comments! and i have edited like the pictureedited code and it has no error! :)

but when i try to call the function, has an error like TypeError: fib() missing 1 required positional argument: 'n'

from pkg.fibonacci import Fibonacci

Fibonacci.fib(100)

see the error message error message2

Answer 1

Not sure if the fib / fib2 is the class method.

if they are, you may add self in the object parameter, as

def fib(self, n)

Then you may call the method like:

f = Fibonacci()
f.fib(5)

The self parameter is referring to the class object, so that you may use self attributes in the class method, in you case, you may have

def fib(self, n):
        a, b = 0, 1
        while a < n:
            print(a, end=' ')
            a, b = b, a + b
        print()
        print(self.title)